This is Turtle.
The Webpage there displays the pump as a Shallow well pump for home use. Then it will be designed for at least 100 psi and over 10 gal. per minute rate. House and water well pumps have a min-uses rate to have. If it will not keep this rate up. The customer will bring it back to seller. The show heads will just go down to a dribble when you get going good. It's got to stay a head of a show running or you get it back to the seller. Now they could have even screw that up too.
We still really don't know what it is for now.
TURTLE